...Liberals had more gray matter at least in the anterior cingulate cortex, a region of the brain that helps people cope with complexity.

The results are not that surprising as they fit in with conclusions from other studies. Just a year ago, researchers from Harvard and UCLA San Diego reported finding a "liberal" gene. This gene had a tiny effect, however, and worked only for adolescents having many friends. The results also mesh with psychological studies on conflict monitoring.

Meanwhile, the neuro-scientific fact of two very different political creatures helps clarify much of the political antics of modern democracies.

Most societies are divided into a party that wants change (the more liberal party) and one that is afraid of change (the conservatives). The liberal party is generally more intellectual and the conservative party is more anti-intellectual.

The conservative party is big on national defense and magnifies our perception of threat, whether of foreign aggressors, immigrants, terrorists, or invading ideologies like Communism. To a conservative, the world really is a frightening place.

"Are people born conservative?" They make it sounds like a birth defect.